Vehicle dry clutch position control method, device, electronic equipment and medium

Abstract

The present invention provides a vehicle dry clutch position control method, device, electronic equipment and medium, belonging to the field of automobile technology, the method comprising: based on the clutch's fully pressed position, fully separated position and the inflection point of the position change rate, dividing the deviation variation range between the actual position of the clutch and the target position into multiple groups of threshold interval combinations; determining the position deviation between the actual position of the clutch and the target position; based on the matching results of the position deviation and the multiple groups of threshold interval combinations, determining the control mode of the solenoid valve, and controlling the solenoid valve based on the control mode, so as to control the clutch position based on the solenoid valve. The present invention improves the response speed in the clutch target position tracking process by grouping the solenoid valves, solving the technical problem that the existing scheme cannot improve the control accuracy and response speed of the clutch position at a lower cost.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a vehicle dry clutch position control method, device, electronic equipment and medium. Background Art

[0002] The existing technical solutions generally realize clutch position control through PID or feedforward + PID control. When the clutch position deviation is large, the solenoid valve corresponding to the clutch is controlled with a high duty cycle. When the position deviation is small, the solenoid valve is controlled with a low duty cycle, or by adding a pressure sensor in the cylinder, the duty cycle control solenoid valve is corrected according to the change rate of the cylinder pressure. The existing technical solutions realize clutch position control through PID or feedforward + PID control. When the clutch target position change rate changes, the control accuracy is low and the response is slow. The method of adding a pressure sensor in the cylinder is costly and has a certain hysteresis. In summary, the existing solutions cannot improve the control accuracy and response speed of the clutch position at a lower cost. Summary of the invention

[0003] In view of this, it is necessary to provide a vehicle dry clutch position control method, device, electronic device and medium to solve the technical problem that the existing solutions cannot improve the control accuracy and response speed of the clutch position at a low cost.

[0004] In order to solve the above problems, the present invention provides a vehicle dry clutch position control method, comprising:

[0005] Based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, the deviation variation range between the actual position and the target position of the clutch is divided into a plurality of groups of threshold interval combinations;

[0006] determining a position deviation between an actual position of the clutch and the target position;

[0007] Based on the matching results of the position deviation and the multiple groups of threshold interval combinations, a control mode of the solenoid valve is determined, and the solenoid valve is controlled based on the control mode, so as to control the clutch position based on the solenoid valve.

[0008] In a possible implementation, the threshold interval combination includes: a first threshold interval, a second threshold interval, a third threshold interval, a fourth threshold interval, a fifth threshold interval and a sixth threshold interval; the inflection point of the position change rate includes: a first inflection point and a second inflection point;

[0009] The deviation variation range between the actual position and the target position of the clutch is divided into multiple groups of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, including:

[0010] Determining a first threshold interval based on the first inflection point and a preset first calibration coefficient group;

[0011] Determining a second threshold interval based on the first inflection point and the second inflection point, and a preset second calibration coefficient group;

[0012] Determining a third threshold interval based on the second inflection point and a preset third calibration coefficient group;

[0013] Determining a fourth threshold interval based on the fully separated position and the second inflection point, and a preset fourth calibration coefficient group;

[0014] Determining a fifth threshold interval based on the fully separated position and the first inflection point, and a preset fifth calibration coefficient group;

[0015] A sixth threshold interval is determined based on the fully separated position and a preset sixth calibration coefficient group.

[0016] In a possible implementation manner, an upper threshold value of the first threshold interval is the first inflection point;

[0017] The upper threshold of the second threshold interval is the difference between the second inflection point and the first inflection point;

[0018] The upper threshold of the third threshold interval is the second inflection point;

[0019] The upper threshold of the fourth threshold interval is the difference between the position when the separation is complete and the second inflection point;

[0020] The upper threshold of the fifth threshold interval is the difference between the position when the separation is complete and the first inflection point;

[0021] The upper threshold of the sixth threshold interval is the completely separated position.

[0022] In one possible implementation, the first threshold interval includes four different threshold sub-intervals, the second threshold interval includes three different threshold sub-intervals, the third threshold interval includes four different threshold sub-intervals, the fourth threshold interval includes three different threshold sub-intervals, the fifth threshold interval includes four different threshold sub-intervals, and the sixth threshold interval includes four different threshold sub-intervals.

[0023] In a possible implementation, the solenoid valve includes a clutch exhaust slow valve and a clutch exhaust fast valve, and the working state of the solenoid valve includes:

[0024] The first group of control modes: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve is normally open;

[0025] The second control mode: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve is normally open;

[0026] The third group of control methods: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve adopts PWM control;

[0027] The fourth control mode: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve adopts PWM control;

[0028] The fifth group of control mode: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve is normally open;

[0029] The sixth control mode: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve adopts PWM control;

[0030] The seventh group of control mode: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve is normally closed;

[0031] The eighth group of control methods: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve is normally closed;

[0032] The ninth group of control modes: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve is normally closed.

[0033] In a possible implementation, the control modes of the solenoid valve corresponding to the four threshold sub-intervals in the first threshold interval include: a first group of control modes, a fifth group of control modes, a seventh group of control modes, and an eighth group of control modes;

[0034] The control modes of the solenoid valve corresponding to the three threshold sub-intervals in the second threshold interval include: a sixth group of control modes, a seventh group of control modes and an eighth group of control modes;

[0035] The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the third threshold interval include: a third group of control modes, a fourth group of control modes, a fifth group of control modes and an eighth group of control modes;

[0036] The control modes of the solenoid valve corresponding to the three threshold sub-intervals in the fourth threshold interval include: a fifth group of control modes, a seventh group of control modes and an eighth group of control modes;

[0037] The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the fifth threshold interval include: a fourth control mode, a sixth control mode, a seventh control mode and an eighth control mode;

[0038] The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the sixth threshold interval include: a first control mode, a second control mode, a fifth control mode and an eighth control mode.

[0039] In a possible implementation, the PWM control includes:

[0040] Determining a reference duty cycle and a frequency of opening the solenoid valve based on an actual position and a position deviation of the solenoid valve;

[0041] The solenoid valve is PWM controlled based on the reference duty cycle and frequency of the solenoid valve opening.

[0042] On the other hand, the present invention also provides a vehicle dry clutch position control device, comprising:

[0043] A combination determination module, for dividing the deviation variation range between the actual position and the target position of the clutch into a plurality of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch;

[0044] a deviation determination module, configured to determine a position deviation between an actual position of the clutch and the target position;

[0045] A control module is used to determine a control mode of the solenoid valve based on a matching result between the position deviation and the multiple groups of threshold interval combinations, and control the solenoid valve based on the control mode to control the clutch position based on the solenoid valve.

[0046] On the other hand, the present invention also provides an electronic device, including a memory and a processor, wherein:

[0047] The memory is used to store programs;

[0048] The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the vehicle dry clutch position control method as described in any one of the above.

[0049] On the other hand, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the vehicle dry clutch position control method as described in any one of the above items are implemented.

[0050] The beneficial effect of adopting the above-mentioned implementation method is: the vehicle dry clutch position control method, device, electronic device and medium provided by the present invention can characterize the change curve and position deviation of the pressure or separation force during the engagement and separation process of the clutch through the inflection point of the clutch's fully compressed position, fully separated position and position change rate, and then be used to divide the deviation variation range between the actual position of the clutch and the target position into multiple groups of threshold interval combinations, and the threshold interval combination can be used to determine the group control method of the solenoid valve, that is, according to the actual deviation between the actual position of the clutch and the target position, determine the corresponding solenoid valve control method, and can adjust the solenoid valve in a targeted manner, thereby improving the response speed and control accuracy during the clutch target position tracking process. In addition, this method does not require adding a pressure sensor in the cylinder, thereby solving the technical problem that the existing solution cannot improve the control accuracy and response speed of the clutch position at a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 A flow chart of an embodiment of a vehicle dry clutch position control method provided by the present invention;

[0053] Figure 2 A flow chart of another embodiment of a vehicle dry clutch position control method provided by the present invention;

[0054] Figure 3 A schematic diagram of a position curve of a clutch from fully separated to fully compressed according to the SBV and FBV provided by the present invention;

[0055] Figure 4 A schematic diagram of an embodiment of a solenoid valve PWM control method provided by the present invention;

[0056] Figure 5 A schematic diagram of another embodiment of the solenoid valve PWM control method provided by the present invention;

[0057] Figure 6 A schematic diagram of clutch target position control under target position step response conditions provided by the present invention;

[0058] Figure 7 A schematic diagram of clutch target position control under a response condition when the target continuously changes provided by the present invention;

[0059] Figure 8 A principle block diagram of an embodiment of a vehicle dry clutch position control device provided by the present invention;

[0060] Figure 9 A schematic structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0062] In the description of the embodiments of the present application, unless otherwise specified, “plurality” means two or more than two.

[0063] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or equipment.

[0064] The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0065] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] The present invention provides a vehicle dry clutch position control method, device, electronic equipment and medium, which are described below respectively.

[0067] The present invention provides a vehicle dry clutch position control method, which comprises:

[0068] Based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, the deviation variation range between the actual position and the target position of the clutch is divided into a plurality of groups of threshold interval combinations;

[0069] determining a position deviation between an actual position of the clutch and the target position;

[0070] Based on the matching results of the position deviation and the multiple groups of threshold interval combinations, a control mode of the solenoid valve is determined, and the solenoid valve is controlled based on the control mode, so as to control the clutch position based on the solenoid valve.

[0071] It can be understood that the control flow chart of the vehicle dry clutch position control method provided by the present invention is as follows: Figure 2 As shown:

[0072] The combination mode of the solenoid valves is determined according to the clutch position deviation and the actual position of the clutch; each solenoid valve is controlled according to the solenoid valve combination mode, position deviation, actual clutch position, and target position change rate, and finally a clutch position control system with closed-loop feedback is realized.

[0073] Clutch position deviation = clutch target position - clutch actual position.

[0074] Take the clutch engagement process as an example:

[0075] The clutch position control system consists of four solenoid valves:

[0076] Clutch Slow Supply Valve (SSV) - clutch release;

[0077] Clutch Fast Supply Valve (FSV) - clutch release;

[0078] Clutch Slow Bleed Valve (SBV) - clutch engagement;

[0079] Clutch Fast Bleed Value (FBV) - clutch engaged;

[0080] Solenoid valve combination: This solenoid valve can be used to control the position of the clutch, which is a dry clutch of the vehicle; define the position of the clutch when it is fully compressed as 0mm, and the position when it is fully separated as max mm. Take a certain type of clutch as an example: fully compressed 0mm, fully separated 15mm, that is, max=15mm; according to the SBV and FBV, the position curve of the clutch from fully separated to fully compressed is as follows Figure 3As shown, the position max when fully disengaged, the position 0 when fully pressed, and the two inflection points P1 and P2 where the clutch position change rate changes significantly are determined.

[0081] Multiple groups of threshold interval combinations may include threshold interval combinations such as 0~P1, P1~P2, 0~P2, P2~max, P1~max, 0~max, etc., and each threshold interval combination may include multiple threshold sub-intervals.

[0082] In some embodiments, the threshold interval combination includes: a first threshold interval, a second threshold interval, a third threshold interval, a fourth threshold interval, a fifth threshold interval and a sixth threshold interval; the inflection point of the position change rate includes: a first inflection point and a second inflection point;

[0083] The deviation variation range between the actual position and the target position of the clutch is divided into multiple groups of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, including:

[0084] Determining a first threshold interval based on the first inflection point and a preset first calibration coefficient group;

[0085] Determining a second threshold interval based on the first inflection point and the second inflection point, and a preset second calibration coefficient group;

[0086] Determining a third threshold interval based on the second inflection point and a preset third calibration coefficient group;

[0087] Determining a fourth threshold interval based on the fully separated position and the second inflection point, and a preset fourth calibration coefficient group;

[0088] Determining a fifth threshold interval based on the fully separated position and the first inflection point, and a preset fifth calibration coefficient group;

[0089] A sixth threshold interval is determined based on the fully separated position and a preset sixth calibration coefficient group.

[0090] It can be understood that the first inflection point and the second inflection point are the two inflection points where the clutch position change rate is most obvious, and each of the first threshold interval, the second threshold interval, the third threshold interval, the fourth threshold interval, the fifth threshold interval and the sixth threshold interval has multiple threshold sub-intervals, and in the multiple threshold sub-intervals in each threshold interval, the upper threshold and the lower threshold of two adjacent threshold sub-intervals overlap.

[0091] Each calibration coefficient group includes multiple calibration coefficients of different sizes, and the value range of the calibration coefficients is between 0 and 1.

[0092] In some embodiments, the first threshold interval, the second threshold interval, the third threshold interval, the fourth threshold interval, and the fifth threshold interval each include a plurality of different threshold sub-intervals;

[0093] The upper threshold of the first threshold interval is the first inflection point;

[0094] The upper threshold of the second threshold interval is the difference between the second inflection point and the first inflection point;

[0095] The upper threshold of the third threshold interval is the second inflection point;

[0096] The upper threshold of the fourth threshold interval is the difference between the position when the separation is complete and the second inflection point;

[0097] The upper threshold of the fifth threshold interval is the difference between the position when the separation is complete and the first inflection point;

[0098] The upper threshold of the sixth threshold interval is the completely separated position.

[0099] In some embodiments, the first threshold interval includes four different threshold sub-intervals, the second threshold interval includes three different threshold sub-intervals, the third threshold interval includes four different threshold sub-intervals, the fourth threshold interval includes three different threshold sub-intervals, the fifth threshold interval includes four different threshold sub-intervals, and the sixth threshold interval includes four different threshold sub-intervals.

[0100] In some embodiments, the solenoid valve includes a clutch exhaust slow valve and a clutch exhaust fast valve, and the working state of the solenoid valve includes:

[0101] The first group of control modes: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve is normally open;

[0102] The second control mode: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve is normally open;

[0103] The third group of control methods: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve adopts PWM control;

[0104] The fourth control mode: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve adopts PWM (pulse width modulation) control;

[0105] The fifth group of control mode: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve is normally open;

[0106] The sixth control mode: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve adopts PWM control;

[0107] The seventh group of control mode: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve is normally closed;

[0108] The eighth group of control methods: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve is normally closed;

[0109] The ninth group of control modes: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve is normally closed.

[0110] It can be understood that the multiple threshold sub-intervals in each threshold interval correspond to different groups of control modes.

[0111] In some embodiments, the control modes of the solenoid valve corresponding to the four threshold sub-intervals in the first threshold interval include: a first group of control modes, a fifth group of control modes, a seventh group of control modes, and an eighth group of control modes;

[0112] The control modes of the solenoid valve corresponding to the three threshold sub-intervals in the second threshold interval include: a sixth group of control modes, a seventh group of control modes and an eighth group of control modes;

[0113] The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the third threshold interval include: a third group of control modes, a fourth group of control modes, a fifth group of control modes and an eighth group of control modes;

[0114] The control modes of the solenoid valve corresponding to the three threshold sub-intervals in the fourth threshold interval include: a fifth group of control modes, a seventh group of control modes and an eighth group of control modes;

[0115] The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the fifth threshold interval include: a fourth control mode, a sixth control mode, a seventh control mode and an eighth control mode;

[0116] The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the sixth threshold interval include: a first control mode, a second control mode, a fifth control mode and an eighth control mode.

[0117] It can be understood that the combination of solenoid valve opening is determined according to the following rules. The solenoid valve opening combination is described as follows. The corresponding SBV and FBV are fully opened. The position curve of the clutch from fully separated to fully compressed is as follows Figure 3 As shown:

[0118] P: actual clutch position; T: target clutch position; E: clutch position deviation;

[0119] α i , β i , ci , d i , e i , g i is the calibration coefficient;

[0120] P ∈ [0, P1], T ∈ [0, P1], E ∈ [0, P1]; α 1 > α 2 > α 3 > α 4, α i ∈ [0, 1];

[0121] P1 α 1 < E <= P1, Sequence 1;

[0122] P1 α 2 < E <= P1 α 1, Sequence 5;

[0123] P1 α 3 < E <= P1 α 2, Sequence 7;

[0124] P1 α < E <= P1 α 3, Sequence 8;

[0125] P ∈ [P1, P2], T ∈ [P1, P2], E ∈ [P1, P2]; β 1 > β 2 > β 3, β i ∈ [0, 1];

[0126] (P2 - P1) β 1 < E <= (P2 - P1), Sequence 6;

[0127] (P2 - P1) β 2 < E <= (P2 - P1) β 1, Sequence 7;

[0128] (P2 - P1) β 3 < E <= (P2 - P1) β 2, Sequence 8;

[0129] P ∈ [P1, P2], T ∈ [0, P1], E ∈ [0, P2]; c 1 > c 2 > c 3 > c 4, c i ∈ [0, 1];

[0130] P2 c 1 < E <= P2, Sequence 3;

[0131] P2 c 2 < E <= P2 c 1, Sequence 4;

[0132] P2 c 3 < E <= P2 c 2, Sequence 5;

[0133] P2 c 4 < E <= P2 c 3, Sequence 8;

[0134] P ∈ [P2, max], T ∈ [P2, max], E ∈ [P2, max]; d 1 > d 2 > d 3, d i ∈ [0, 1];

[0135] (max - P2) d 1 < E <= (max - P2), Sequence 5;

[0136] (max - P2) d 2 < E <= (max - P2) d 1, Sequence 7;

[0137] (max - P2) d 3 < E <= (max - P2) d 2, Sequence 8;

[0138] P ∈ [P2, max], T ∈ [P1, P2], E ∈ [P1, max]; e 1> e 2> e 3> e 4, e i ∈ [0, 1];

[0139] (max - P1) e 1 < E <= (max - P1), Sequence 4;

[0140] (max - P1) e 2 < E <= (max - P1) e 1, Sequence 6;

[0141] (max - P1) e 3 < E <= (max - P1) e 2, Sequence 7;

[0142] (max - P1) e 4 < E <= (max - P1) e 3, Sequence 8;

[0143] P ∈ [P2, max], T ∈ [0, P1], E ∈ [0, max]; g 1> g 2> g 3> g 4, g i ∈ [0, 1];

[0144] max g 1 < E <= max, Sequence 1;

[0145] max g 2 < E <= max g 1, Sequence 2;

[0146] max g 3 < E <= max g 2, Sequence 5;

[0147] max g 4 < E <= max g 3, sequence 8;

[0148] The solenoid valve combination is shown in Table 1:

[0149] Table 1: Solenoid valve combination

[0150]

[0151] Among them, sequence 1 is the first group of control methods, sequence 2 is the second group of control methods, sequence 3 is the third group of control methods, sequence 4 is the fourth group of control methods, sequence 5 is the fifth group of control methods, sequence 6 is the sixth group of control methods, sequence 7 is the seventh group of control methods, sequence 8 is the eighth group of control methods, and sequence 9 is the ninth group of control methods.

[0152] Taking clutch engagement as an example, according to the exhaust volume when the exhaust valve is opened, the solenoid valves are grouped as follows. There are 8 combination control modes. ON represents that the solenoid valve is normally open, OFF represents that the solenoid valve is normally closed, and PWM represents that the solenoid valve is controlled by PWM with a certain duty cycle and frequency.

[0153] In some embodiments, a vehicle dry clutch position control method is characterized in that the PWM control comprises:

[0154] Determining a reference duty cycle and a frequency of opening the solenoid valve based on an actual position and a position deviation of the solenoid valve;

[0155] The solenoid valve is PWM controlled based on the reference duty cycle and frequency of the solenoid valve opening.

[0156] It can be understood that the solenoid valve control: For the control method of a single solenoid valve, taking the PWM control of the SBV during the clutch engagement process as an example, the specific details are as follows:

[0157] Solenoid valve PWM control method such as Figure 4 As shown, (for example: duty cycle 60%, frequency 1 / 20):

[0158] Among them, BSW stands for Basic Software;

[0159] Follow the following principles: for the same actual position, the greater the position deviation, the higher the duty cycle and the faster the frequency; for the same position deviation, the deeper the actual position of the clutch, the higher the duty cycle and the faster the frequency;

[0160] The modified duty cycle and frequency of the solenoid valve opening are determined according to the rate of change of the actual position and the target position of the clutch. The following principle is followed: the faster the rate of change of the target position, the higher the duty cycle and the faster the frequency. The final PWM control method of the solenoid valve is as follows: Figure 5 shown.

[0161] In some embodiments, after adopting the vehicle dry clutch position control method provided by the present invention, after calibration and debugging on a vehicle equipped with an AMT (automatic transmission), the clutch target position control schematic diagram under the target position step response condition is as follows: Figure 6 As shown in the figure, the clutch target position control schematic diagram under the response condition when the target changes continuously is as follows Figure 7 As shown, from Figure 6 and Figure 7 It can be seen that the response speed is significantly improved.

[0162] In summary, the vehicle dry clutch position control method provided by the present invention includes: based on the clutch's fully pressed position, fully separated position and the inflection point of the position change rate, dividing the deviation variation range between the actual position of the clutch and the target position into multiple groups of threshold interval combinations; determining the position deviation between the actual position of the clutch and the target position; determining the control mode of the solenoid valve based on the matching results of the position deviation and the multiple groups of threshold interval combinations, and controlling the solenoid valve based on the control mode, so as to control the clutch position based on the solenoid valve.

[0163] The vehicle dry clutch position control method provided by the present invention can characterize the change curve and position deviation of the pressure or separation force during the engagement and separation process of the clutch through the fully compressed position, the fully separated position and the inflection point of the position change rate of the clutch, and then be used to divide the deviation variation range between the actual position and the target position of the clutch into multiple groups of threshold interval combinations. The grouping method of the solenoid valves can be determined through the threshold interval combination, that is, the method of grouping the solenoid valves, thereby improving the response speed during the clutch target position tracking process. The method does not need to add a pressure sensor in the cylinder, and solves the technical problem that the existing solution cannot improve the control accuracy and response speed of the clutch position at a low cost.

[0164] In addition, during the continuous change of the clutch target position, the solenoid valve adopts variable frequency and variable duty cycle control methods to improve the accuracy and response speed of clutch target tracking.

[0165] like Figure 8 As shown, the present invention also provides a vehicle dry clutch position control device 800, which includes:

[0166] A combination determination module 801 is used to divide the deviation variation range between the actual position and the target position of the clutch into a plurality of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch;

[0167] a deviation determination module 802, for determining a position deviation between the actual position of the clutch and the target position;

[0168] The control module 803 is used to determine the control mode of the solenoid valve based on the matching result between the position deviation and the multiple groups of threshold interval combinations, and control the solenoid valve based on the control mode to control the clutch position based on the solenoid valve.

[0169] In some embodiments, the threshold interval combination includes: a first threshold interval, a second threshold interval, a third threshold interval, a fourth threshold interval, a fifth threshold interval, and a sixth threshold interval; the inflection point of the position change rate includes: a first inflection point and a second inflection point;

[0170] The deviation variation range between the actual position and the target position of the clutch is divided into multiple groups of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, including:

[0171] Determining a first threshold interval based on the first inflection point and a preset first calibration coefficient group;

[0172] Determining a second threshold interval based on the first inflection point and the second inflection point, and a preset second calibration coefficient group;

[0173] Determining a third threshold interval based on the second inflection point and a preset third calibration coefficient group;

[0174] Determining a fourth threshold interval based on the fully separated position and the second inflection point, and a preset fourth calibration coefficient group;

[0175] Determining a fifth threshold interval based on the fully separated position and the first inflection point, and a preset fifth calibration coefficient group;

[0176] A sixth threshold interval is determined based on the fully separated position and a preset sixth calibration coefficient group.

[0177] The vehicle dry clutch position control device provided by the present invention can characterize the change curve and position deviation of the pressure or separation force during the engagement and separation process of the clutch through the fully compressed position, the fully separated position and the inflection point of the position change rate of the clutch, and is further used to divide the deviation variation range between the actual position and the target position of the clutch into multiple groups of threshold interval combinations. The grouping method of the solenoid valves can be determined through the threshold interval combination, that is, the method of grouping the solenoid valves, thereby improving the response speed during the clutch target position tracking process. The method does not require adding a pressure sensor in the cylinder, and solves the technical problem that the existing solution cannot improve the control accuracy and response speed of the clutch position at a low cost.

[0178] In addition, during the continuous change of the clutch target position, the solenoid valve adopts variable frequency and variable duty cycle control methods to improve the accuracy and response speed of clutch target tracking.

[0179] The vehicle dry clutch position control device provided in the above embodiment can implement the technical solution described in the above vehicle dry clutch position control method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above vehicle dry clutch position control method embodiment, which will not be repeated here.

[0180] like Figure 9 As shown, the present invention also provides an electronic device 900. The electronic device 900 includes a processor 901, a memory 902 and a display 903. Figure 9 Only some components of the electronic device 900 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0181] In some embodiments, the memory 902 may be an internal storage unit of the electronic device 900, such as a hard disk or memory of the electronic device 900. In other embodiments, the memory 902 may also be an external storage device of the electronic device 900, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the electronic device 900.

[0182] Furthermore, the memory 902 may include both an internal storage unit of the electronic device 900 and an external storage device. The memory 902 is used to store application software installed in the electronic device 900 and various data.

[0183] In some embodiments, the processor 901 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 902, such as the vehicle dry clutch position control method of the present invention.

[0184] In some embodiments, the display 903 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 903 is used to display information on the electronic device 900 and to display a visual user interface. The components 901-903 of the electronic device 900 communicate with each other via a system bus.

[0185] In some embodiments of the present invention, when the processor 901 executes the vehicle dry clutch position control program in the memory 902, the following steps may be implemented:

[0186] Based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, the deviation variation range between the actual position and the target position of the clutch is divided into a plurality of groups of threshold interval combinations;

[0187] determining a position deviation between an actual position of the clutch and the target position;

[0188] Based on the matching results of the position deviation and the multiple groups of threshold interval combinations, a control mode of the solenoid valve is determined, and the solenoid valve is controlled based on the control mode, so as to control the clutch position based on the solenoid valve.

[0189] It should be understood that: when the processor 901 executes the vehicle dry clutch position control program in the memory 902, in addition to the above functions, other functions can also be implemented. For details, please refer to the description of the corresponding method embodiment above.

[0190] Furthermore, the embodiment of the present invention does not specifically limit the type of the electronic device 900 mentioned, and the electronic device 900 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic device may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 900 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0191] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the vehicle dry clutch position control method provided by the above methods is implemented, and the method includes:

[0192] Based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, the deviation variation range between the actual position and the target position of the clutch is divided into a plurality of groups of threshold interval combinations;

[0193] determining a position deviation between an actual position of the clutch and the target position;

[0194] Based on the matching results of the position deviation and the multiple groups of threshold interval combinations, a control mode of the solenoid valve is determined, and the solenoid valve is controlled based on the control mode, so as to control the clutch position based on the solenoid valve.

[0195] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0196] The vehicle dry clutch position control method, device, electronic device and medium provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A vehicle dry clutch position control method, characterized in that: include: Based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, the deviation variation range between the actual position and the target position of the clutch is divided into a plurality of groups of threshold interval combinations; determining a position deviation between an actual position of the clutch and the target position; Determining a control mode of the solenoid valve based on a matching result between the position deviation and the plurality of threshold interval combinations, and controlling the solenoid valve based on the control mode, so as to control the clutch position based on the solenoid valve; The threshold interval combination includes: a first threshold interval, a second threshold interval, a third threshold interval, a fourth threshold interval, a fifth threshold interval and a sixth threshold interval; the inflection point of the position change rate includes: a first inflection point and a second inflection point; The deviation variation range between the actual position and the target position of the clutch is divided into multiple groups of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, including: Determining a first threshold interval based on the first inflection point and a preset first calibration coefficient group; Determining a second threshold interval based on the first inflection point and the second inflection point, and a preset second calibration coefficient group; Determining a third threshold interval based on the second inflection point and a preset third calibration coefficient group; Determining a fourth threshold interval based on the fully separated position and the second inflection point, and a preset fourth calibration coefficient group; Determining a fifth threshold interval based on the fully separated position and the first inflection point, and a preset fifth calibration coefficient group; A sixth threshold interval is determined based on the fully separated position and a preset sixth calibration coefficient group.

2. The vehicle dry clutch position control method according to claim 1, characterized in that: The upper threshold of the first threshold interval is the first inflection point; The upper threshold of the second threshold interval is the difference between the second inflection point and the first inflection point; The upper threshold of the third threshold interval is the second inflection point; The upper threshold of the fourth threshold interval is the difference between the position when the separation is complete and the second inflection point; The upper threshold of the fifth threshold interval is the difference between the position when the separation is complete and the first inflection point; The upper threshold of the sixth threshold interval is the completely separated position.

3. The vehicle dry clutch position control method according to claim 2, characterized in that: The first threshold interval includes four different threshold sub-intervals, the second threshold interval includes three different threshold sub-intervals, the third threshold interval includes four different threshold sub-intervals, the fourth threshold interval includes three different threshold sub-intervals, the fifth threshold interval includes four different threshold sub-intervals, and the sixth threshold interval includes four different threshold sub-intervals.

4. The vehicle dry clutch position control method according to claim 3, characterized in that: The solenoid valve includes a clutch exhaust slow valve and a clutch exhaust fast valve, and the working state of the solenoid valve includes: The first group of control modes: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve is normally open; The second control mode: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve is normally open; The third control mode: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve adopts PWM control; The fourth control mode: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve adopts PWM control; The fifth group of control mode: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve is normally open; The sixth control mode: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve adopts PWM control; The seventh group of control mode: the clutch exhaust slow valve is normally open and the clutch exhaust fast valve is normally closed; The eighth group of control methods: the clutch exhaust slow valve adopts PWM control and the clutch exhaust fast valve is normally closed; The ninth group of control modes: the clutch exhaust slow valve is normally closed and the clutch exhaust fast valve is normally closed.

5. The vehicle dry clutch position control method according to claim 4, characterized in that: The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the first threshold interval include: a first control mode, a fifth control mode, a seventh control mode and an eighth control mode; The control modes of the solenoid valve corresponding to the three threshold sub-intervals in the second threshold interval include: a sixth group of control modes, a seventh group of control modes and an eighth group of control modes; The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the third threshold interval include: a third group of control modes, a fourth group of control modes, a fifth group of control modes and an eighth group of control modes; The control modes of the solenoid valve corresponding to the three threshold sub-intervals in the fourth threshold interval include: a fifth group of control modes, a seventh group of control modes and an eighth group of control modes; The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the fifth threshold interval include: a fourth control mode, a sixth control mode, a seventh control mode and an eighth control mode; The control modes of the solenoid valve corresponding to the four threshold sub-intervals in the sixth threshold interval include: a first control mode group, a second control mode group, a fifth control mode group and an eighth control mode group.

6. The vehicle dry clutch position control method according to claim 4, characterized in that: The PWM control comprises: Determining a reference duty cycle and a frequency of opening the solenoid valve based on an actual position and a position deviation of the solenoid valve; The solenoid valve is PWM controlled based on the reference duty cycle and frequency of the solenoid valve opening.

7. A vehicle dry clutch position control device, characterized in that: include: A combination determination module, for dividing the deviation variation range between the actual position and the target position of the clutch into a plurality of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch; a deviation determination module, configured to determine a position deviation between an actual position of the clutch and the target position; A control module, configured to determine a control mode of the solenoid valve based on a matching result between the position deviation and the plurality of threshold interval combinations, and control the solenoid valve based on the control mode, so as to control the clutch position based on the solenoid valve; The threshold interval combination includes: a first threshold interval, a second threshold interval, a third threshold interval, a fourth threshold interval, a fifth threshold interval and a sixth threshold interval; the inflection point of the position change rate includes: a first inflection point and a second inflection point; The deviation variation range between the actual position and the target position of the clutch is divided into multiple groups of threshold interval combinations based on the fully pressed position, the fully separated position and the inflection point of the position change rate of the clutch, including: Determining a first threshold interval based on the first inflection point and a preset first calibration coefficient group; Determining a second threshold interval based on the first inflection point and the second inflection point, and a preset second calibration coefficient group; Determining a third threshold interval based on the second inflection point and a preset third calibration coefficient group; Determining a fourth threshold interval based on the fully separated position and the second inflection point, and a preset fourth calibration coefficient group; Determining a fifth threshold interval based on the fully separated position and the first inflection point, and a preset fifth calibration coefficient group; A sixth threshold interval is determined based on the fully separated position and a preset sixth calibration coefficient group.

8. An electronic device, characterized in that: comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the vehicle dry clutch position control method as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the vehicle dry clutch position control method according to any one of claims 1 to 6 are implemented.

Images